如何使用dotnet spark正确实例化spark会话？

using Microsoft.Spark.Sql;

SparkSession spark = SparkSession.Builder()
    .AppName("SparkDotnetExample")
    .GetOrCreate();

spark.SparkContext.SetLogLevel("WARN");

spark.Conf.Set("spark.executor.memory", "2g");
spark.Conf.Set("spark.driver.memory", "1g");

spark.SparkContext.AddJar("path/to/your.jar");

spark.SparkContext.DefaultParallelism = 4;

DataFrame dataFrame = spark.Read()
    .Format("csv")
    .Option("header", "true")
    .Load("path/to/your.csv");